Stool



FIG. 1 is a perspective view of a stool showing our new design;

FIG. 2 is a front view thereof, the back, the right side and the leftside being identical;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

The broken lines shown in the drawings depict environmental subjectmatter and form no part of the claimed design.

CLAIM The ornamental design for a stool, as shown and described.